2 years after an expensive roof shampoo to remove black algae stains from an asphalt roof, the stains are back and now black mold or algae is also covering a retaining wall and patio. Find out how to control Black Algae with annual Roof Armor applications.
Learn about what causes roof shingle stains and streaks. Explore the choice of a DIY roof cleaning product or hiring a professional roof cleaner. Either way your roof can be cleaner!